ampere-hour

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ampere-hour

[′am‚pir ¦au̇·ər]
(electricity)
A unit for the quantity of electricity, obtained by integrating current flow in amperes over the time in hours for its flow; used as a measure of battery capacity. Abbreviated Ah; amp-hr.

ampere-hour

A current flow for one hour measured in amperes (amps). Abbreviated "Ah" and commonly called "amp-hour," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliampere-hour (mAh) rating is used. For example, a 500 mAh battery means it will release 500 milliamps of current at a specific voltage for one hour before it is discharged. See ampere.


Amp-Hours and Watt-Hours
Batteries can be rated in amp-hours (Ah) or watt-hours (Wh) as shown in these examples for a digital camera. The bottom battery is equivalent to 3.3 Wh, while the top battery is equivalent to 667 mAh.
References in periodicals archive ?
After product registration in Japan, a foreign medical device company's products and the classifications of those products will be the basis of the services required for a MAH or DMAH.
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Doctor Mah was then encouraged to look into creating halal skincare products.
For some, the lunch may be the only meal that they eat all day, and keeping the program running is of utmost importance," said Mah.
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Mah complicates that picture by showing, first, that German thinkers and artists borrowed from long-standing French critiques of their own culture and language and, second, that rather than being based on consistent hostility, the relationship was a love-hate one with a fair amount of (national) self-doubt involved.
Mah also spoke about the Voluntary Compliance Initiative, part of a set of tax shelter laws enacted during the recent legislative session.
It means that we influence the programs they should have," said Sean Mah.
There was a distinct difference between StarHub and the rest,'' Communications Minister Mah Bow Tan said at a news conference.
Mah, managing partner of QSM Associates, will keynote the OOP 2013 conference in Munich, with new insights on Agile development.
North America Power Banks Market, By Product Type Portable Power Banks Solar Power Banks North America Power Banks Market, By Power Rating: 20,000 mAh -- 80,000 mAh Above 80,000 mAh North America Power Banks Market, By Application: Industrial/B2B Disaster Preparedness/Emergency/Backup Fire Fighting/Rescue Law Enforcement Resource Extraction Construction Healthcare Foreign Aid Security Robotics Events Photography Others (Telecom, etc.